I agree some give u headache stomach problem's,nothing that i couldn't handle though.to me the pills gave me the most obvious tell tale physical signs like good vascularity after taking then eating carb's after about 1/2 hour,the drink's taking prior to training after hitting few sets some really good pumps,i really liked super charged by labrada was the best tasting too,no explode tasted and mixed horribly,i tried a company formula was called preshock it was disgusting ,i'll try mhp's it was recommended on this post.